Detailed Product Description

FZRN21-12D/T125-31.5 indoor vacuum high voltage circuit breaker which is also named ZFN21 vacuum load switch is formal installed with fuse, earthing knife. It has the adtantages of strong power of opening, reliable safety, long lifetime of electricity, possibility of frequent operating, tight structure,small size,  light weight,almost no need to maintain and so on. This breaker can also protect transformer from overload and has obvious isolation clearance. Earthing knife that has closing ability and electric spring mechanism can be installed